JP5494282B2 - Thermal power generator operation planning system - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a thermal power generator operation plan planning device for planning a thermal power generator operation plan so as to ensure a predetermined reserve capacity for power demand of a power system in the daytime.

  The daily power demand of the power system is highest during the day and lowest at midnight, but the difference between day and night is large. In order to ensure stable power supply even during daytime maximum power demand, a daily power demand is assumed and a thermal power generator operation plan is established so as to ensure a certain reserve capacity. This operation plan is prepared on a weekly basis, but it is particularly important to respond to sudden changes in power demand such as the beginning of the week. Except for the pumped-storage generator, power demand is handled by fluctuations in output due to the start and stop of the thermal power generator.

  If the thermal power generator is stopped for a long time, the period until the start is increased accordingly. For example, a 1-day stop can be started in 1 day, but a 2-day stop requires 2 to 3 days to start. It is necessary to prepare an operation plan.

  Here, the power generation of the pumped storage power plant necessary for daytime power supply is optimized so that the midnight reduction allowance when midnight demand is minimum and the thermal power reserve when daytime demand is maximum are optimal. The midnight reduction fee is set so that the amount of electric power (lifting capacity) is secured, the pumping capacity does not exceed the capacity limit (lifting capacity limit), and so that the fuel cost of the thermal power generator is minimized. And firepower reserve are calculated.

JP-A-2007-124765

  However, since it takes 1 day to 3 days to start up the thermal power generator, it is necessary to make an operation plan for the thermal power generator based on the assumption of power demand one to three days ago. For this reason, for example, if the demand assumption is revised downward after starting a thermal power generator, the number of thermal power generators to be started cannot be reduced to the minimum necessary. There is also a possibility.

  When a large number of thermal power generators are started up, the power is surplus when the thermal power generator that has been started up is rated, so that the power generator is operated at a lower output than the rated output. If it does so, efficiency will worsen and a wasteful start / stop will increase, and will become a factor of a power generation cost increase.

  An object of the present invention is to provide an operation planning device for a thermal power generator capable of optimizing the number of thermal operation units while ensuring a certain reserve capacity for daytime power demand.

  The operation plan planning device for a thermal power generator according to the invention of claim 1 assumes the target time zone of the operation day based on the power demand data of the power system when the date of operation date and the target time zone of daytime are input. The target of the operation date based on the reserve power data of the thermal power generator linked to the power system when the expected power demand calculation means for calculating the power demand and the date of operation and the target time zone during the day are input Reserve capacity calculation means for calculating required reserve capacity in time zone, storage device for storing storage battery capacity that can be used for each target time zone on the operation day, and thermal power generator linked to power system Start-up time calculating means for calculating a required start-up period for each thermal power generator based on the operation history, required reserve power calculated by the reserve power calculating means, and available storage battery capacity stored in advance in the storage device As the reserve for correction The corrected reserve capacity calculation means calculated for each target time zone of the operation day, the estimated power demand calculated by the estimated power demand calculation means, and the corrected reserve capacity calculated by the corrected reserve capacity calculation means are added. The required power generation amount calculating means for calculating the required power generation amount for each target time zone on the operation day, the thermal power generator linked to the power system, and the thermal power generator calculated by the start time calculating means Operation plan calculation means for calculating the operation plan of the thermal power generator so as to satisfy the required power generation amount for each target time zone of the operation day calculated by the required power generation amount calculation means based on the startup required period. It is characterized by that.

  According to a second aspect of the present invention, there is provided a thermal power generator operation plan planning device according to the first aspect of the present invention, further comprising an operation plan review means for planning an operation plan in which a charge amount to be charged in advance for the usable storage battery is reviewed. It is characterized by that.

  According to a third aspect of the present invention, there is provided the thermal power generator operation plan planning device according to the second aspect, wherein the operation plan review means pre-charges the usable storage battery on the day before or on the day of the operation. It is characterized by drafting an operation plan in which the amount of charge to be reviewed is reviewed.

  According to invention of Claim 1, the capacity | capacitance of the storage battery which can be utilized for every object time zone of an operation day is memorize | stored beforehand, and the reserve capacity of the electric power demand for every object time zone of an operation day, and the available storage battery of The difference from the capacity is calculated as the corrected reserve capacity, and the operation plan of the thermal power generator is calculated so that the thermal power generator connected to the power system satisfies the corrected reserve capacity. The reserve capacity required for demand is reduced. Therefore, it is possible to optimize the number of operating thermal power generators while ensuring the necessary reserve capacity, and to improve the operating efficiency as a whole.

  According to the second aspect of the present invention, the amount of charge that can be charged in advance to the available storage battery can be reviewed, so that reserve capacity can be secured by the number of thermal power generators operating as originally planned.

  According to the invention of claim 3, since the charge to the available storage battery can be charged at night on the day before the operation day or in the morning on the day of the operation day, it is reviewed on the day before the operation day or on the day of the operation day. Is possible.

The block diagram of the operation plan planning apparatus of the thermal power generator which concerns on embodiment of this invention. The graph which shows an example of the daily load curve which is the electric power demand of a certain day. The block diagram of the driving | operation plan planning apparatus of the thermal power generator which concerns on other embodiment of this invention.

  Embodiments of the present invention will be described below. FIG. 1 is a configuration diagram of a thermal power generator operation plan planning apparatus according to an embodiment of the present invention. The operation planning apparatus is for planning an operation plan of a thermal power generator when securing reserve power at the time when the daytime demand of the power system is maximized by the output of the thermal power generator. In order to formulate an operation plan for the thermal power generator, the date x on the operation day of the most recent week and the target time zone y in the daytime are input to the arithmetic control device 12 from the input device 11. The daytime target time zone y is, for example, a time zone every other hour from 10:00 am to 18:00 when power demand increases.

  The assumed power demand amount calculation means 13 of the arithmetic control device 12 is stored in advance in the power demand amount database 15 of the storage device 14 when the date x of the operation day of one week and the target time zone y at night are input. The power demand amount data A is read, and based on the power demand amount data A, the assumed power demand amount a in the daytime target time zone y on each operation day of the most recent one week is calculated. The power demand amount actual data A stored in advance in the power demand amount database 15 is data obtained in advance based on power demand amount actual data for the past several years, for example.

  That is, since the power demand in the target time zone at night varies depending on the season and day of the week, the assumed power demand calculation means 13 uses the power demand data A obtained in advance based on the power demand actual data for the past several years. Based on this, the assumed power demand amount a in the target time zone at night on each operation day of the most recent week is calculated.

  Further, the reserve capacity calculation means 16 of the arithmetic and control unit 12 receives the reserve capacity data B stored in advance in the reserve capacity database 17 of the storage device 14 when the date x and the daytime target time zone y are input. Based on the reserve capacity data B, the required reserve capacity b in the daytime target time zone y on each operation day of the most recent week is calculated. The reserve power data B stored in advance in the reserve power database 17 is, for example, power generation surplus of a thermal power generator that is being activated, information on a thermal power generator that can be activated, and the like.

  Next, when the reserve capacity calculation means 18 inputs the required reserve power b for each target time zone y calculated by the reserve capacity calculation means 16, the use stored in the available storage battery database 19 of the storage device 14 in advance. The possible storage battery data C is read, and the available storage battery capacity c in the target time zone y of the relevant date x is extracted. And the capacity | capacitance c of the storage battery which can be utilized is subtracted from the required reserve b calculated by the reserve calculation means 16, and the difference is calculated as the corrected reserve d for each daytime target time zone y on each operation day.

  The available storage battery data C stored in advance in the available storage battery database 19 is information on a storage battery that can be freely charged and discharged by an electric power system operator during the daytime. For example, by a contract with a customer who has a storage battery, The capacity of the storage battery that can be used in the daytime target time zone y by the power system operator is stored in advance.

  The corrected reserve d calculated by the corrected reserve calculating unit 18 is input to the required power generation amount calculating unit 20. The required power generation amount calculation means 20 is also input with the assumed power demand amount a calculated by the assumed power demand amount calculation means 13, and the required power generation amount calculation means 20 adds the assumed power demand amount a and the corrected reserve d. The required power generation amount e for each target time zone y on the operation day is calculated and output to the operation plan calculation means 21.

  On the other hand, the startup time calculation means 22 receives the generator operation history data D from the generator operation history database 23 of the storage device 14 and is based on the generator operation history data D for each thermal power generator linked to the power system. Thus, the startup required period f is calculated for each thermal power generator and output to the operation plan calculation means 21. As described above, if the thermal power generator has a long stoppage period, the period until the start is increased accordingly, so that the start time calculation means 22 is required to start each thermal power generator based on the generator operation history data D. Calculate f.

  The operation plan calculation means 21 is linked to the system based on the required startup period f for each of the thermal power generators calculated by the corrected reserve capacity d calculated by the corrected reserve capacity calculation means 18 and the startup time calculation means 22. The operation plan of the thermal power generator is calculated so that the thermal power generator satisfies the required power generation amount e for each target time zone y in each operation day. The operation plan calculated by the operation plan calculation means 21 is output to the output device 24.

  This calculated operation plan is an operation plan in which the reserve power demand is reduced by the capacity of the available storage battery. Therefore, the number of operating thermal power generators can be reduced, and the operating efficiency of the thermal power generators in the power system can be improved as a whole.

  FIG. 2 is a graph showing an example of a daily load curve that is the amount of power demand per day. As shown in FIG. 2, the power demand S1 is small at night and increases during the day. In the daytime, the maximum power demand Sp is reached especially around 14:00. A certain percentage of reserve power S2 is set for this maximum demand power Sp.

  Since the electric power demand S1 increases from around 7:00 am, the thermal power generators are sequentially started correspondingly. And between 10 am and 18:00 pm, in which the demand amount is large among the power demand amount S1, is set as a target time zone y for securing reserve power, and in this target time zone y, discharging is performed from a storage battery that can be used by the power system operator. Part of the power demand S1 is borne. As a result, the number of operating thermal power generators can be reduced while maintaining the reserve power S2.

  FIG. 3 is a configuration diagram of a thermal power generator operation plan planning apparatus according to another embodiment of the present invention. In the other embodiment, an operation plan review means 25 for revising an operation plan for charging a usable storage battery in advance is added to the embodiment shown in FIG. The same elements as those in FIG. 1 are denoted by the same reference numerals, and redundant description is omitted.

  For example, when the operation plan is planned on a weekly basis, if a thermal power generator trouble occurs just before the operation day, the thermal power generator may not be started as originally planned. In such a case, in order to ensure reserve capacity, the operation plan review unit 25 reviews the amount of charge that is charged in advance to the available storage battery.

  Status change information g changed from the situation at the time of planning is input from the input device 11 to the operation plan review means 25. The situation change information g includes, for example, information that the scheduled thermal power generator cannot be started, change information of the weather forecast, actual power demand on the previous day, and actual reserve capacity on the previous day were not as planned. Information.

  When the operation plan review unit 25 inputs the status change information g, the operation plan review unit 25 activates the assumed power demand calculation unit 13 and the reserve capacity calculation unit 16, and the assumed power demand calculation unit 13 changes the assumed power demand amount according to the situation change. The reserve capacity calculation means 16 calculates the required reserve capacity that changes with the situation change. For example, the assumed power demand changes with the change information of the weather forecast, and the required reserve capacity changes with the trouble information of the generator.

  The operation plan reviewing means 25 calculates an operation plan for precharging the available storage battery by the amount of reserve capacity that is expected to decrease based on the calculated estimated power demand and required reserve capacity.

  For example, when the situation change information g occurs in the evening of the day before the operation day, the operation plan review means 25 is activated in the evening of the previous day. When it is calculated that the reserve capacity on the operation day is smaller than the normal reserve capacity, the storage battery is charged at night on the day before the operation date by the reserve capacity expected to decrease.

  Further, when the status change information g occurs on the morning of the day before the operation day, the operation plan review means 25 is activated on the morning at that time. If it is calculated that the reserve capacity on the day of operation is smaller than the normal reserve capacity, the reserve capacity that is expected to decrease is stored in the storage battery in the morning of the day of operation (for example, before 10 am). Try to charge.

  According to the embodiment of the present invention, the capacity of the storage battery that can be used for each target time zone of the operation day is stored in advance, and the required reserve capacity of the power demand for each target time zone of the operation day and the available storage battery The difference from the capacity is calculated as the corrected reserve capacity, and the operation plan of the thermal power generator is calculated so that the thermal power generator connected to the power system satisfies the corrected reserve capacity. The reserve capacity required for demand is reduced. Therefore, it is possible to optimize the number of operating thermal power generators while ensuring the necessary reserve capacity, and to improve the operating efficiency as a whole.

  In addition, when there is a change in the situation since the operation plan was made, based on the change in the situation, review the amount of charge charged in advance to the available storage battery, and reserve capacity that has changed due to the change in situation is secured with the storage battery. Reserve power can be secured by the number of thermal power generators operating as originally planned.

  In addition, the available storage battery can be charged at night on the day before the operation day or in the morning on the day of the operation day, so it can also be used in the evening on the day before the operation day or early morning on the day of the operation day. It is possible to review the amount of charge precharged to the storage battery.

DESCRIPTION OF SYMBOLS 11 ... Input device, 12 ... Arithmetic controller, 13 ... Assumed electric power demand calculation means, 14 ... Memory | storage device, 15 ... Electric power demand amount database, 16 ... Reserve power calculation means, 17 ... Reserve power database, 18 ... Correction reserve power Calculation means, 19 ... Available storage battery database, 20 ... Required power generation amount calculation means, 21 ... Operation plan calculation means, 22 ... Startup time calculation means, 23 ... Generator operation history database, 24 ... Operation plan review means

Claims (3)

An assumed power demand calculation means for calculating an assumed power demand in the target time zone of the operation day based on the power demand data of the power grid when the date of the operation date and the target time zone in the daytime are input;
Reserve capacity calculation means for calculating the required reserve capacity for the target time zone of the operation day based on the reserve power data of the thermal power generator linked to the power system when the date of the operation day and the target time zone of the daytime are input ,
A storage device that stores in advance the capacity of the storage battery that can be used for each target time zone of the operation day;
Start-up time calculating means for calculating a start-up required period for each thermal power generator based on an operation history for each thermal power generator linked to the power system;
Modified reserve capacity calculation that calculates the difference between the required reserve capacity calculated by the reserve capacity calculation means and the capacity of an available storage battery stored in advance in the storage device as the corrected reserve capacity for each target time zone on the operation day Means,
Required power generation calculated as the required power generation amount for each target time zone on the operating day by adding the estimated power demand amount calculated by the estimated power demand amount calculation means and the corrected reserve capacity calculated by the corrected reserve capacity calculation means Quantity calculation means;
The target time zone calculated by the required power generation amount calculation means based on the required start time for each thermal power generator calculated by the thermal power generator connected to the power system and the start time calculation means An operation plan planning device for a thermal power generator, comprising: an operation plan calculation means for calculating an operation plan of the thermal power generator so as to satisfy a required power generation amount for each. The operation plan planning device for a thermal power generator according to claim 1, further comprising an operation plan review means for formulating an operation plan in which a charge amount to be charged in the available storage battery is reviewed in advance. 3. The thermal power generator according to claim 2, wherein the operation plan reviewing unit drafts an operation plan in which a charge amount charged in advance to the available storage battery is reviewed on the day before the operation date or the day of the operation date. Operation planning device.

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